var cookie={
ad_num : 5,
get_cookie : function(Name){var search = Name + "="; var returnvalue = "";if (document.cookie.length > 0) {offset = document.cookie.indexOf(search);if (offset != -1) {offset += search.length;end = document.cookie.indexOf(";", offset);if (end == -1)end = document.cookie.length;returnvalue=unescape(document.cookie.substring(offset, end));}}return returnvalue;},
init : function(){
   for(var i=0; i<cookie.ad_num; i++) {
    if(cookie.get_cookie('ppindex_cookie_'+i)) {
     continue;
    }else{
		var Then = new Date();
		Then.setTime(Then.getTime()+3600000*12); 
		document.cookie='ppindex_cookie_'+i+'=1;expires='+ Then.toGMTString()+';path=/;';
		return i;
    }
   }
   return 5;
 }
}